Tourists view the Cullinan Big Hole at the Cullinan mine in Cullinan of Gauteng, South Africa, Aug. 13, 2023. (Xinhua/Zhang Yudong)
This photo taken on Aug. 13, 2023 shows the Cullinan Big Hole at the Cullinan mine in Cullinan of Gauteng, South Africa. (Xinhua/Zhang Yudong)
This photo taken on Aug. 13, 2023 shows the replica of the "Great Star of Africa" (L) at the Cullinan mine in Cullinan of Gauteng, South Africa. (Xinhua/Zhang Yudong)
This photo taken on Aug. 13, 2023 shows the replicas of Cullinan Diamond and diamonds cut from it at the Cullinan mine in Cullinan of Gauteng, South Africa. (Xinhua/Zhang Yudong)
This photo taken on Aug. 13, 2023 shows the cutting process demonstrated by diamond replicas at the Cullinan mine in Cullinan of Gauteng, South Africa. (Xinhua/Zhang Yudong)